<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
        </el-col>
      </el-row>
      <!--角色列表区域-->
      <el-table :data="roleList" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template v-slot:default="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']"
                    v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable
                        @close="removeRightById(scope.row,item1.id)">{{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!--通过for循环嵌套渲染二级权限-->
                <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2,i2)
                in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable
                            @close="removeRightById(scope.row,item2.id)">{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!--三级权限-->
                  <el-col :span="18">
                    <el-tag v-for="(item3,i3) in item2.children"
                            :key="item3.id" type="warning" closable
                            @close="removeRightById(scope.row,item3.id)">{{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <pre>
              {{scope.row}}
            </pre>
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column labrl="角色名称" prop="roleName"></el-table-column>
        <el-table-column labrl="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column labrl="操作" width="300px">
          <template v-slot:default="scope">
            <!--编辑按钮-->
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑
            </el-button>
            <!--删除按钮-->
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除
            </el-button>
            <!--分配权限按钮-->
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>

        </el-table-column>
      </el-table>
    </el-card>

    <!--添加角色的对话框-->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed">
      <!--内容主主体区域-->
      <el-form :model="addForm" ref="addFormRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRole">确 定</el-button>
  </span>
    </el-dialog>
    <!--编辑角色的对话框-->
    <el-dialog
      title="提示"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed">
      <!--内容主主体区域-->
      <el-form :model="editForm" ref="editFormRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRoleInfo">确 定</el-button>
  </span>
    </el-dialog>
    <!--分配权限的对话框-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed">
      <!--树形空间-->
      <el-tree :data="rightsList"
               :props="treeProps"
               show-checkbox
               node-key="id"
               default-expand-all
               :default-checked-keys="defKeys"
               ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        //所有角色列表数据
        roleList: [],
        //控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        //所有权限的数据
        rightsList: [],
        //树形控件的属性绑定对象

        treeProps: {
          label: 'authName',
          children: 'children'
        },
        //默认选中的节点id值数组
        defKeys: [],
        //当前即将分配权限的角色
        roleId:'',
        //添加用户的表单数据
        addForm: {
          roleName: '',
          roleDesc: '',
        },
        //控制添加角色对话框的显示与隐藏
        addDialogVisible: false,
        //控制编辑角色对话框的显示与隐藏
        editDialogVisible: false,
        //查询到的用户信息对象
        editForm: {},
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      //获取所有角色列表
      async getRolesList() {
        const {data: res} = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败')
        }

        this.roleList = res.data

        console.log(this.roleList)
      },
      //监听添加用户对话框的关闭事件
      addDialogClosed() {
        this.$refs.addFormRef.resetFields()
      },
      //点击按钮，添加新用户
      addRole() {
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return
          //可以发起添加用户的网络请求
          const {data: res} = await this.$http.post('roles', this.addForm)
          if (res.meta.status !== 201) {
            this.$message.error('添加角色失败')
          }
          this.$message.success('添加角色成功')
          //隐藏添加用户的对话框
          this.addDialogVisible = false
          //重新获取用户列表
          this.getRolesList()
        })
      },
      //展示编辑角色的对话框
      async showEditDialog(id) {
        const {data: res} = await this.$http.get('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('查询数据失败')
        }
        this.editForm = res.data
        this.editDialogVisible = true;
      },

      //监听添加用户对话框的关闭事件
      editDialogClosed() {
        this.$refs.editFormRef.resetFields()
      },
      //修改用户信息并提交
      editRoleInfo() {
        this.$refs.editFormRef.validate(async valid => {
          console.log(valid)
          if (!valid) return
          //发起修改角色信息的数据请求
          const {data: res} = await this.$http.put('roles/' + this.editForm.id, {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          })

          if (res.meta.status !== 200) {
            return this.$message.error('更新角色信息失败')
          }

          //关闭对话框
          this.editDialogVisible = false
          //刷新数据列表
          this.getRolesList()
          //提示修改成功
          this.$message.success('更新角色信息成功')
        })
      },

      //根据id删除对应的角色信息
      async removeRoleById(id) {
        //弹窗询问用户是否删除数据
        const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)

        //如果用户确认删除，则返回值为字符串 confirm
        //如果用户取消了删除，则返回值为字符串 cancel
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const {data: res} = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('删除角色失败')
        }
        this.$message.success('删除用户成功')
        this.getRolesList()
      },
      //根据id删除对应的权限
      async removeRightById(role, rightId) {
        //弹框提示用户是否删除
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除')
        }

        const {data: res} = await this.$http.delete('roles/' + role.id + '/rights/' + rightId)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败')
        }
        role.children = res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleId=role.id
        //获取所有权限数据
        const {data: res} = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取数据失败')
        }
        //获取到的权限数据保存到 data 中
        this.rightsList = res.data
        console.log(this.rightsList)
        //递归获取三级节点的id
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      },
      //通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
      getLeafKeys(node, arr) {
        //如果当前node节点不包括children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }

        node.children.forEach(item =>
          this.getLeafKeys(item, arr))
      },
      //监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defKeys = []
      },
      //点击为角色分配权限
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]

        const idStr = keys.join(',')

        const {data:res} = await this.$http.post('roles/'+this.roleId+'/rights',{rids:idStr})
        if(res.meta.status !== 200){
          return this.$message.error('分配权限失败')
        }
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDialogVisible = false
      }


    }
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
